AI 中文总结
本文从理论上证明，高压可显著增强超硬六方氮化钨（h-WN₆）的高次谐波产生（HHG），其压力诱导的带隙展宽为克服固态极紫外（EUV）光源的截止限制提供了新策略。
AI 中文摘要
固体中的高次谐波产生（HHG）为开发紧凑的极紫外（EUV）光源提供了途径，这类光源对阿秒科学和先进光谱学至关重要。本文从理论上证明，高压可显著增强超硬六方氮化钨（h-WN₆）中的HHG。与常压下的固态系统相比，高压下重构的电子环境使h-WN₆出现独特的带隙展宽，这提高了材料的损伤阈值，允许使用更强的激光场并可触及更高能的能带。这种压力诱导的带隙展宽为克服固态EUV光源的截止限制提供了有前景的策略。
英文摘要
High harmonic generation (HHG) in solids offers a pathway to develop compact extreme ultraviolet (EUV) sources crucial for attosecond science and advanced spectroscopy. Here, we demonstrate theoretically that high pressure dramatically enhances HHG in superhard hexagonal tungsten nitride (h-WN6). Compared with solid-state systems at ambient pressure, the reshaped electronic environment under high pressure leads to a unique band-gap widening in h-WN6, which raises the material's damage threshold, allowing the use of stronger laser fields and enabling access to higher-energy bands. This pressure-induced band-gap widening offers a promising strategy to overcome the cutoff limitation of solid-state EUV light sources.
Comments9 pages, 9 figures, including Supplemental Material
